> backing up the brinks truck

now that's a phrase I have only heard in one other context: as an alleged quote from former Boston Celtics player Isaiah Thomas (who was really about 5'7 despite his official listed 5'9; yes, professional basketball player in NBA). This was around 2017 when he had just come off a career year and was soon due for a contract extension in the low 9 figures. He got injured and bounced around for a few years before eventually leaving the league, and never got that payday.